Gang-disk grinder.



Li M. ENDRES.

GANG'DISK GRINDER. APPLICATION FILED MAR. 9, 1918.

1,279,526. PatentedSept. 24,1918.

ZSHEETS-SHEET I.

WITNESSES: I E TOR- ATTORNEY Patented Sept. 24,1918.

' 2 SHEETSSHEET 2.

INV NTOR A firm Zr S E S S E N l W ATTORNEY- Lnwnnivcn M. ENIDRES, or QROSSPLAINS,,WISGQNSIN.

- To all whom it may concern." a

Be it known that I, LAWRENOn; M.

DRE-S, a citizen of the United States, and resident of Cross Plains, in the county of Dane and State of VV-isconsin, have invented certain new and useful Improvements-in Gang-Disk Grinders; andnI-do hereby declare that the following'is a full, clear-,and exact description thereof A 7 My invention has for its primaryobject to provide a simple, economical and-durable gang disk grinder, the arrangement and construction of which issuch that the entire series of disks can be ground simultaneously without dismantling, it being contemplated to utilize the grinding machine either as a fixture or portable device, in which latter case the said device would be suitably mounted upon a truck whereby it can be readily transported from place to place.

A further object of my invention is to provide means for adjustably supporting s the entire gang of disks upon the frame,

whereby they will be positively and simultaneously fed to aseries of grinding wheels also mounted upon the frame. r

' Another object of my invention is to provide a universal-bar and yielding'con'nections between thebar and grinder wheels,

whereby a compensating engagement between the entire series of said wheels and the disks can be effected. Y

A still further object of -my invention is to provide means for adjusting the grinder wheels with relation to thedi'sks tof-be groundindependently; 1 With the above and other objects in'view the invention consists in certain peculiarities of construction and combination ofinechanicalelements as hereinafter set forth with reference to the drawings-and subsequently claimed. 'I o. .1 a I:

' In the drawings* F g l represents a 'face view of 'a grinder machine exemplifying one form of carrying out mY IIIVGIitlOII, parts: being broken awayand section: to more clearly illustratestructurahfeatures;

:2, a a cross-sectionof. thei'same shows ing a gang disk harrow in 'light'lines positimed to be operated upon-by the grinding wheels, the :section being indicated by line 2-2 of-Fig. l}, and, i 1

; Fig; 3,-a'n enlarged detailed sectional-view of one of thegrinderwheel units-,the'same' ingoperation; r 7

Referring by characters to the drawings, 1 represents a skeletonframe provided with s V '..P entedse t 191 Application filedMa'rch 9,19 18.- Seria1 No.221,464. Y 7' i 1 being shown-positioned against a ortion of a harrowxortpulverizer disk toe ect gI1I1d-,

horizontally disposed brackets 2, the 'upper V legs of which brackets are' 'slotted' as n2 for -..the reception of spindle-supporting blocks 3 which are notched'out to receive the spindle 4 or hubs of the outer pair of disks 5, which are units-of a series used in the ordinary type of disk harrow or pulverizer. Each of the blocks- 3 is provided with a threaded ear 3 which is engaged-by a screwthreaded adjusting rod 6 that'isvprovided with 'a cranked handle and is provided with suitable bearings in the bracket 2. This mechanism is to provide horizontal adjustment of the harrow spindle and its series of cutting" disks, whereby the edges of said units;

While I have-shown the rods 6 arranged to be adjusted independently by their cranks, it is manifest that these rods may be in linkor'gear connectioniso as to ob- :ta1n a simultaneous ad ustment-of them.

The'frameis provided with suitableend bearingsfor a shaft 7 ,qwhich shaft, in this shaft 7 and are arranged to rotate with :it,

but have adjustment axially thereof.

I cutting disks willbefed to the grinding preferred arrangement, of mounting the wheels-8wis best showirin .Fig. 3 of the drawings, in which view it willbe seen-that the shaft" 7 at the pointof mountingof each grinder wheel is provided with a key-way 7, which is 'slidably engaged byr a key 9 that is carried byaisleeve 9. he sleeve is loosely mounted'upon the shaft and has a sl'ottherein for. the reception of the key "9 which is: 'droppeds in1position-approxi-' mately flush with. the 'outer faceof said sleeves In assembling the parts thereafter the grinder wheel '8- is slipped over one end of said'sl'eev'e against-a collar portions)" thereof and a collar10is'then- 'adjusted over the sleeve against the juxtaposed face :of the'pwheelt; Thus 'thel key 9" is held in posi tion by these parts. The wheel is'then-secured by'a binding nut'll which is in thread e'd unionwith one end of theasleeve; and

adapted-' tofimpinge. against the-.colla1;; '10 5 whereby the grinder wheel is locked to the sleeve.

In order to effect longitudinal or axial movement of the grinder wheel assemblage, I provide a hexagon collar or nut 11 which is also in threaded engagement with the sleeve end and is positioned withrelation to the nut 11 so as to form an annulangroove between these parts. The groove is adapted to receive :a pair of wear washers .12, between which is anounted a spanner ring 18 having sets of pins 13 projecting rfrom=op- .positesides "thereof. The pins .13 are *en- .gaged'by the spannered end :14 of a lever '14, which lever :is ifulcrumed' to the outerend of a bracket .15, the fulcrum being effected by the lever passing through anaperture in the'end of saidbracket. The turned up end of this bracket is apertured and mounted upona bolt 16*to permit slight longitudinal play on the bolt and connected to a hoo'ked end of said bolt and an eye of thebracket 15 is a pull-spring :17, whereby the'bra-cket is normally held by the spring pressure against-the face of an arm 18 which carries the 'bolt 16.

As best shown in Fig. :1, each of rthe arms 18- are right angular in shape and'the upper Eleg 18 in each instance isc-lamped to:a uni- 'versal adjusting :bar :19 by means of san eye-bolt 20. The eye-bolt is providedwith 1a *handr'nutQO which is in threaded "union therewith and adapted to draw the parts tightly together through its engagement with the uppersurfa'ce o-f'the bar :19, :it being understood that the eye-bolts 20 .pass through a slotin said bar, which slot :is in this instance provided by' the skeleton construction 'of the :bar 19, it being formed in two parts connected by suitable bolts and spacing thimbles. The eyed head of each bolt 20' forms a loose pi ot connection for its corresponding lever 1 1. The universal "bar 19-is iadj'ustably :mounted upon knees of the frame, being guided and *confin'ed by studs .21. "One end of the universal' bar 19 iswen'gaged by 'a threaded spindle .22 having a 'hELHd-CI'ELILlIFQQ at its outer end whereby the spindle is'rotated to move the bar parallel to the-grinder wheel shaft, the spindle 22 having its bearing in a bracket with whioh'the frame is provided.

'Attention --is directed to the fact that-the wearwasherspmy which constitute apart of the wheel hubassemblage, are provided :for

the purpose of replacement a-s the friction ofethe relatively anovable and fixed (parts in the :groove may, from time to-time, 'cause more or :less wearrand hencerequire renewal of said rings. i

In the operation','eafterthe several springccntrdlled adjusting units :of rilthe series *of "grinder veheelsfha'iie Jbeen izregudated so as Etorgriridihedisks upon one face "asshown in ililig... 3,1power is:applieditoltheidriwe shaft 7,

drawings. This reversal of the ipressureflof the springs is elfectedby loosening the hand :nut'20 of each unit and thereafter the-arm 118 =ofxeach unit :is swung from right to left whereby the .positionof saidarm is reversed from that shown in Fig. 1. Thexparts are then adj usted and the hand-nut is tightened so that the spring pressure will force the .g'rinder wheels from right to left and thus the disks to be ."ground (which may be of any type) are then sharpened upon their reverse faces from-thatshown in Fig. 3. This operation is very-simple toe'fi'ect as it is only necessary to swivel the arms 18 upon their bolts and the brackets consequently will rotate with said arms. It is obvious that the disks to be ground can be arranged with any suitable driving connection from the shaft 7 whereby they may be intermittently or continuously rotated slowly aboutitheir axes so as to accomplish the desired :result, it being-preferable :to use a crank-driven by power from the shaft 7 with an intermittent ratchet feed uponthe harrow disks.

While I have :shownand described 'one form of my invention in all of its -details,'

it is understood that 'thestructural features of the exemplification fully explained may be varied within the scope of the claims as understood the skilled mechanic. 7

. Attention :also directedto the fact that, in the drawings, the grinding machine is .fixed toia'baseybut it is understood that the accomplish.

In order co-compensate the;grindi ngwpressure -of the, wheels upon the disks,v each wheel is provided with independent wadjiusting means and pressure :control. Bhe tension of the springs 1:7 canbe regulated to a certain degree and independent faxial" adjustment OfFGttcll grinder wheel 8 can be effected by 'nianipnlating thie:hand-imts .20, whereby the levers 14 are "shifted with their fulerums. After each wheel has been .adj usted to the satisfaction of the *operator, so "as "to sobtain "a amiform abrasive contact with'irelat-ion to the disks, the 1 entire gang of 7 wheels can be simultaneously adjusted by :movement of the universal bar through its manipnlatingrthreaded: spindle:22.

Attention is further directed to the fact that as the grindino of the outer edges of the disks is accomp ished, they maybe fed up to the grinder wheels by the rods6 in such manner that the tapered grinding faces of the wheels 8 are maintained indefinitely irrespective of wear. l

I claim:

1. A gang disk grinder comprising a supporting frame for the disk spindle, a rotatable shaft mounted upon the frame, a

series of grinder wheels revoluble with and tary shaft mounted upon the frame, a se-V ries of grinder wheels revoluble with and axially movable upon the shaft, a universal adj usting means for the grinder wheels, and

an independent adjusting means for each grinder wheel.

3. A gang disk grinder comprising a sup-V porting frame adapted to receive without dismantlement the disks to be ground, a rotary shaft mounted upon the frame, a series of grinder wheels revoluble with and axially movable upon the shaft, a universal adjusting bar, levers suspended from the bar and in spanner connection with the,

wheels, and a medially positioned yieldable fulcrum point for each lever carried by the bar.

4. A gang disk grinder comprising a supporting frame for the disk spindle, a rotatable shaft mounted upon the frame, a se- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Wisconsin.

ries of grinder wheels revoluble with and axially movable upon the shaft,a universal adjusting bar mounted upon the frame, an

independent yieldable connection between the bar and each grinder wheel, a pair of blocks slidably mounted upon the frame and adapted to receive the gang disk spindle,

and threaded adjusting rods engageable with the blocks.

5. A, disk grinder comprisin shaft, an abra ing wheel revolub e with and a rotary axially movable upon the'shaft, a lever in spanner connection with the abrading wheel hub, a bar, a shiftable'pivoti onnection carried by the bar for the lever, ayieldable connection arranged medially of the lever carv ried by said bar, and means for adjusting the bar.

6. A gang disk grinder comprising a supporting frame for the disk spindle, a rotatable' shaft mounted upon the frame, a'

spanner connection with the hub of each abrading wheel, a universally adjustable bar,

a shiftable pivot connection carried by the bar for each lever, and an intermediately positionedfulcrum'point for each lever carried by said bar. r

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of LAWRENCE M. ENDRES.

Washington, D. 0. 

